Answer :

The current gain β=50

Input current in a common emitter mode is the base current. Change in base current or input current = δIb=50μA


Output voltage, V0 =β×RG=50×20.5=200V


(a) Voltage Gain, VG=V0/V1


Input voltage, V1= δlb+Ri


Input resistance, Ri = 0.5kΩ = 500Ω


VG = 200/(50×106+500)


VG=8000V


(b) Change in input voltage, δV1 = δlb×Ri


= 50×106×5×102


=25×103 V


=25 mV


(c) Resistance Gain, RG= Load Resistance/Input resistance


= RL/Ri


Power gain =β2×RG


=β2×RL/Ri


=2500×2/0.5=2500×20.5
=2500×205=104


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